Combustion turbulence device

Abstract

The combustion turbulence device comprises a speed-adjustable fan system, a speed-adjustable fan system placing platform, a porous air distribution plate and a particle filtering device, the speed-adjustable fan system placing platform is placed above the particle filtering device; a porous air distribution plate is arranged at the upper part of the speed-adjustable fan system placing platform; the speed-adjustable fan system placing platform comprises a cylinder, a circle of annular positioning boss is arranged at a cylinder opening of the lower end of the cylinder, and an installation disc is arranged on the outer wall of the lower end of the cylinder and installed on a lower flange end cover through a supporting rod and a platform fixing nut. A groove is formed in the upper end opening of the cylinder; the porous air distribution plate comprises an annular disc, a medicine strip clamp small cylinder is arranged on the inner ring of the annular disc, a plurality of uniform gas circulation holes are distributed in the annular disc, and a boss is arranged on the edge of the annular disc. The device adsorbs condensed phase particles generated by combustion of solid propellant medicine strips, clean internal circulation flowing gas is provided in the high-pressure combustion chamber, and the problem that smoke particles are unfavorable for observation of the combustion phenomenon when the solid propellant is combusted can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid propellant high-pressure combustion devices, and more specifically, to a combustion turbulence device. Background Art

[0002] When solid propellants burn inside an engine, they are accompanied by high-temperature and high-pressure environmental conditions, making it difficult to observe the specific combustion phenomena. To address this problem, solid propellant powder combustion experiments are conducted in a sealed high-pressure container to simulate the combustion inside a solid engine. By opening a high-pressure transparent combustion window around the sealed high-pressure combustion chamber, the measurement instrument can easily observe the combustion phenomena of the solid propellant in the high-pressure combustion chamber. However, when solid propellants burn, smoke formed by metal combustion condensed phase particles and coke particles produced by incomplete combustion of organic matter can enter the observation field due to diffusion and turbulence, thereby affecting the observation of combustion phenomena. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems in the prior art, the utility model provides a combustion turbulence device, the main purpose of which is to adsorb the condensed phase particles produced by the combustion of solid propellant strips, provide clean internal circulating flow gas in the high-pressure combustion chamber, and effectively solve the problem of the influence of smoke particles on the observation of combustion phenomena.

[0004] The technical solution of the present utility model is achieved through the following measures: a combustion turbulence device, including an adjustable-speed fan system, an adjustable-speed fan system placement platform, a porous air distribution plate for loading solid propellant strips, and a particle filter device; the adjustable-speed fan system placement platform is placed above the particle filter device, and a porous air distribution plate is provided on the upper part of the adjustable-speed fan system placement platform; the adjustable-speed fan system placement platform includes a cylinder, a circle of annular positioning bosses for positioning the adjustable-speed fan system and the particle filter device is provided at the lower end of the cylinder, the outer wall of the lower end of the cylinder is provided with a mounting plate extending radially outward, the mounting plate is mounted on the lower flange end cover via a support rod and a platform fixing nut; a groove for positioning the porous air distribution plate is provided at the upper end of the cylinder; the porous air distribution plate includes an annular disk, the inner ring of the annular disk is provided with a small cylinder for placing solid propellant strips extending axially, a plurality of gas uniform circulation holes are distributed on the annular disk, and the edge of the annular disk has two or more bosses that cooperate with the grooves.

[0005] The particle filtering device includes a perforated filter mesh tube and a high-temperature resistant activated carbon filter cotton cylinder layer. The high-temperature resistant activated carbon filter cotton is sleeved on the outside of the perforated filter mesh tube with a supporting function; the outer ring surface A of the annular positioning boss cooperates with the inner ring of the perforated filter mesh tube for positioning.

[0006] The speed-adjustable fan system includes a fan motor, speed-adjustable fan blades and blade supporting parts; the speed-adjustable fan blades are placed in the blade supporting parts, and the fan motor is placed under the blade supporting parts.

[0007] The upper surface B of the annular positioning boss is used to position the blade supporting parts of the adjustable speed fan system.

[0008] The solid propellant strip is installed in the small cylinder of the strip clamp through the strip clamp; the strip clamp includes a clamp platform, on which there are fixed clips, movable clips, and strip fastening bolts for clamping the solid propellant strip installed between the fixed clips and the movable clips; the clamp platform is placed in the small cylinder of the strip clamp above the porous air distribution plate in the combustion turbulence device, and the flange at the upper end of the clamp platform is positioned at the barrel mouth of the small cylinder of the strip clamp above the porous air distribution plate.

[0009] The device of the utility model has a reasonable and compact structure and an ingenious design. It utilizes a particle filtering device to remove condensed phase particle products. The clean gas phase combustion products make the combustion of the solid propellant closer to the combustion environment inside the solid rocket engine. The device is stable and reliable, can be easily disassembled and maintained, and has the characteristics of low cost. It can be applied to the observation experiment of high-pressure combustion phenomenon of solid propellant under any formula. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] These and / or other aspects and advantages of the present invention will become more clear and easier to understand from the following detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, in which:

[0011] Figure 1 This is a diagram of the use state of the utility model;

[0012] Figure 2 It is a cross-sectional view of the particle filter structure;

[0013] Figure 3 This is a partial structural cross-sectional view of the combustion turbulence device of the utility model;

[0014] Figure 4 Place a cross-sectional view of the platform structure for the adjustable speed fan system;

[0015] Figure 5 Schematic diagram of the adjustable speed fan system;

[0016] Figure 6 Schematic diagram of the porous air distribution plate structure;

[0017] Figure 7 Schematic diagram of the medicine strip and fixture structure. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of this embodiment clearer, the technical solution is described in more detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0019] In this embodiment, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 The positional relationships of front, back, top, bottom, left, and right are described in the layout of the manual. Figure 1 The layout direction is determined by the

[0020] In the description of this embodiment, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this embodiment based on the specific content of the technical solution.

[0021] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present invention. The present embodiments are described in detail below with reference to the accompanying drawings:

[0022] Attachment Figure 1 It is a schematic cross-sectional view of the overall structure of the visualized solid propellant high-pressure combustion turbulence device according to this embodiment, including a visualized high-pressure combustion chamber, a heating wire ignition system, a particle filtering device, a combustion turbulence device, and a powder rod clamp.

[0023] The visual high-pressure combustion chamber is a closed container. The combustion chamber cavity 107 and the combustion chamber lower flange end cover 117 are connected and fastened by the lower flange end cover bolts 116 and the lower flange end cover nuts 115; the combustion chamber cavity 107 and the combustion chamber upper flange end cover 105 are connected and fastened by the upper flange end cover bolts 103 and the upper flange end cover nuts 106; four mutually perpendicular visual windows are opened in the middle position of the combustion chamber cavity 107; the visual windows are pressed against the transparent observation window sheet 1 by the observation window cover plate 108 under the connection and fastening action of the observation window bolts 111 and the observation window nut 112 10; The lower part of the combustion chamber cavity 107 is connected to the combustion chamber air inlet solenoid valve controller 113, and the combustion chamber air outlet solenoid valve controller 118 is connected to it at the opposite position, and a reserved opening 114 for the fan motor connection line is left in the vertical direction of the air inlet and the air outlet axis; a temperature sensor 102 and a pressure sensor 104 are set on the upper part of the combustion chamber upper flange end cover 105; the lower flange end cover 117 is reserved with a small hole for installing the heating wire ignition electrode 202, and the support rods 304 of the three adjustable speed fan system support platforms are evenly welded on the lower flange end cover 117 in a 120° direction.

[0024] Attachment Figure 2 It is a cross-sectional view of the particle filter structure. The particle filter device consists of two parts, namely, high-temperature resistant activated carbon filter cotton 301 and punched filter mesh tube 302. The high-temperature resistant activated carbon filter cotton 301 is sleeved on the outside of the punched filter mesh tube 302 which has a supporting function.

[0025] Attachment Figure 3 This is a cross-sectional view of the combustion turbulence device. The adjustable-speed fan system includes a fan motor 303, adjustable-speed fan blades 306, and blade support components 308. After the adjustable-speed fan system is installed within an adjustable-speed fan system placement platform 307, a porous air distribution plate 309 is placed atop the adjustable-speed fan system placement platform 307 and can rotate slightly to prevent the motor fan airflow from affecting the porous air distribution plate 309.

[0026] Figure 4 In the figure, the adjustable speed fan system placement platform 307 includes a cylinder 317, and a circle of annular positioning bosses 316 are arranged at the lower end of the cylinder 317. The upper surface B of the annular positioning bosses 316 is used to position the fan blade support parts 308 of the adjustable speed fan system. The outer ring A of the annular positioning bosses 316 cooperates with the inner ring of the punched filter mesh tube 302 for positioning. The outer wall of the lower end of the cylinder has a radially outward extending mounting plate 315, and the mounting plate 315 is mounted on the lower flange end cover 117 through the support rod 304 and the platform fixing nut 305; the upper end of the cylinder 317 has a groove 318 for positioning the porous air distribution plate 309.

[0027] Figure 5 In the figure, the adjustable speed fan system includes a fan motor 303, adjustable speed fan blades 306 and blade supporting parts 308; the adjustable speed fan blades 306 are placed in the blade supporting parts 308, and the fan motor 303 is placed at the lower part of the blade supporting parts 308.

[0028] Figure 6 In the figure, the porous air distribution plate 309 includes a circular disk 320, the inner ring of which has a small cylinder 322 for placing a medicine strip clamp extending axially for placing a clamp platform, and a plurality of gas uniform circulation holes 321 are distributed on the circular disk. The edge of the circular disk 320 has more than two bosses 319 that cooperate with the groove 318.

[0029] Attachment Figure 7 Schematic diagram of the propellant strip and fixture structure, including a fixture platform 310, a fixed clip 314, a movable clip 312, and a strip fastening bolt 311 for clamping a solid propellant strip 313 mounted between the fixed clip 314 and the movable clip 312. On the fixture platform 310, the strip fastening bolt 311 and the movable clip 312 are used to clamp the solid propellant strip 313 of a fixed length and shape to prevent shaking and tipping during the combustion of the solid propellant.

[0030] During use, the visualized high-pressure combustion chamber is placed on the experimental platform and fixed, the ignition electrode terminal 201 is connected to the external control voltage, the fan motor connection line reserved port 114 is connected to the wire and sealed; the combustion chamber air outlet electromagnetic control valve 118 is in the open state, and the combustion chamber air inlet electromagnetic control valve 113 is in the closed state; the upper flange end cover 105 of the visualized high-pressure combustion chamber is opened, and the sealed high-pressure combustion chamber is in the open state.

[0031] Place the adjustable speed fan system inside the adjustable speed fan system placement platform 307, so that the small cylinder 319 of the porous air distribution plate 309 is on the top for installation, and then rotate the porous air distribution plate 309 slightly counterclockwise so that the protruding bosses 321 on both sides can enter the pits in the adjustable speed fan system placement platform 307 to achieve fit, thereby preventing the airflow generated by the adjustable speed fan system from causing fluctuations in the porous air distribution plate 309.

[0032] The high temperature resistant activated carbon filter cotton 301 is inserted into the punched filter mesh tube 302 to form a particle filter device, and the particle filter device is placed in the middle position of the lower flange end cover 117.

[0033] The combustion turbulence device is placed above the particle filter device, and the lower end surface of the adjustable speed fan system placement platform 307 has a boss structure (i.e., an annular positioning boss 316), which ensures that the adjustable speed fan system placement platform 307 can closely cooperate with the punched filter mesh tube 302; the adjustable speed fan system placement platform 307 is installed on the support rod 304 of the adjustable speed fan system support platform, and then the platform fixing nut 305 is tightened to ensure that the lower end surface of the adjustable speed fan system support platform 307 is in close contact with the upper end surface of the high temperature resistant activated carbon filter cotton 301 and the lower end surface of the high temperature resistant activated carbon filter cotton 301 is in close contact with the lower flange end cover 117, so as to prevent the condensed phase particles generated by the combustion of the solid propellant powder from flowing in the gap of the contact surface.

[0034] Cut a solid propellant strip 313 with a thickness of 3 mm, a width of 10 mm, and a length of 40 mm. Pass the propellant ignition wire 401 through the upper end of the solid propellant strip 313 so that the solid propellant strip 313 is in the middle of the propellant ignition wire 401. Place the solid propellant strip 313 on the clamp platform 310 and clamp the solid propellant strip 313 with the strip fastening bolt 311 and the movable clamp 312. Place the solid propellant strip 313 and the clamp holding the solid propellant strip 313 in the small cylinder 319 above the porous air distribution plate 309 in the combustion turbulence device. Adjust the position of the strip and the clamp so that the largest surface of the solid propellant strip is aligned with the observation line.

[0035] The two ends of the propellant ignition wire 401 are respectively wound on the heating wire ignition electrode 202; the upper flange end cover bolts 103 and the upper flange end cover nuts 106 are used to make the combustion chamber upper flange end cover 105 in close contact with the combustion chamber cavity 107. During the installation process, the upper flange end cover handle 101 is outside the high-pressure combustion chamber.

[0036] Close the combustion chamber air outlet electromagnetic control valve 118, open the combustion chamber air inlet electromagnetic control valve 113, introduce high-pressure gas into the visualized high-pressure combustion chamber, use the pressure sensor 104 to monitor the pressure inside the combustion chamber until the set pressure value is reached, close the combustion chamber air inlet electromagnetic control valve 113, and maintain no gas leakage for 30 seconds; turn on the adjustable speed fan system and set the required speed; energize the propellant ignition wire 401 to ignite the solid propellant strip 313, and use external instruments and equipment to observe the phenomena accompanying the combustion process of the solid propellant strip 313.

[0037] After the solid propellant pellets 313 are burned, the adjustable-speed fan system is continuously operated for 3 minutes to allow all the condensed phase particles generated by the combustion of the solid propellant pellets 313 to be adsorbed on the high-temperature resistant activated carbon filter cotton 301. The adjustable-speed fan system is then shut down, and the electromagnetic control valve 118 at the combustion chamber outlet is opened to discharge the high-pressure gas in the combustion chamber.

[0038] When the gas pressure in the combustion chamber is consistent with the external environmental pressure, open the upper flange end cover 105 of the visualized high-pressure combustion chamber, take out the clamp platform 310 of the solid propellant strip, clamp it again to prepare a new solid propellant strip 313 sample, and repeat the measurement; to measure multiple solid propellant strip 313 combustion experiments, it is necessary to replace the high-temperature resistant activated carbon filter cotton 301, take out the clamp platform 310 of the solid propellant strip, remove the platform fixing nut 305, then take out the combustion turbulence device, and finally take out the particle filter device, replace it with a new high-temperature resistant activated carbon filter cotton 301, and re-install it in order to complete multiple solid propellant strip 313 combustion phenomenon observation experiments.

Claims

1. A combustion turbulence device, characterized in that: The invention comprises an adjustable speed fan system, an adjustable speed fan system placement platform (307), a porous air distribution plate (309) for accommodating solid propellant strips, and a particle filter device; the adjustable speed fan system placement platform (307) is placed above the particle filter device, and the porous air distribution plate (309) is provided on the upper portion of the adjustable speed fan system placement platform (307); The adjustable speed fan system placement platform (307) includes a cylinder (317), a ring-shaped positioning boss (316) for positioning the adjustable speed fan system and the particle filter device is provided at the lower end of the cylinder (317), and a mounting plate (315) extending radially outward is provided on the outer wall of the lower end of the cylinder. The mounting plate (315) is mounted on the lower flange end cover (117) via a support rod (304) and a platform fixing nut (305); a groove (318) for positioning the porous air distribution plate (309) is provided at the upper end of the cylinder (317); The porous air distribution plate (309) includes a circular disk (320), the inner ring of which has a small cylinder (322) extending axially for placing a solid propellant strip, a plurality of gas uniform circulation holes (321) distributed on the circular disk, and an edge of the circular disk (320) having two or more bosses (319) that cooperate with the groove (318).

2. The combustion turbulence device according to claim 1, characterized in that: The particle filtering device comprises a perforated filter mesh tube (302) and a high-temperature resistant activated carbon filter cotton (301), wherein the high-temperature resistant activated carbon filter cotton (301) is sleeved on the outside of the perforated filter mesh tube (302) having a supporting function; and the outer ring surface A of the annular positioning boss (316) cooperates with the inner ring of the perforated filter mesh tube (302) for positioning.

3. The combustion turbulence device according to claim 1, characterized in that: The adjustable speed fan system comprises a fan motor (303), adjustable speed fan blades (306) and a blade support part (308); the adjustable speed fan blades (306) are placed inside the blade support part (308), and the fan motor (303) is placed below the blade support part (308).

4. The combustion turbulence device according to claim 3, characterized in that: The upper surface B of the annular positioning boss (316) is used to position the fan blade support part (308) of the adjustable speed fan system.

5. The combustion turbulence device according to claim 1, characterized in that: The solid propellant medicine strip is mounted on a medicine strip clamp small cylinder (322) via a medicine strip clamp; the medicine strip clamp comprises a clamp platform (310), on which are provided a fixed clip (314), a movable clip (312), and a medicine strip fastening bolt (311) for clamping a solid propellant medicine strip (313) mounted between the fixed clip (314) and the movable clip (312); the clamp platform (310) is placed in the medicine strip clamp small cylinder (322) above a porous air distribution plate (309) in a combustion turbulence device, and a flange at the upper end of the clamp platform (310) is positioned at the barrel mouth of the medicine strip clamp small cylinder (322) above the porous air distribution plate (309).

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